Joni Tammi
Head of Department
Metsähovi Radio Observatory
Full researcher profile
https://research.aalto.fi/...
Email
[email protected]
Phone number
+358294424858
Areas of expertise
Astrophysics, Astronomy, Teaching, Radio astronomy, Numerical modelling, Pedagogy, 115 Astronomy and space science, 516 Educational sciences, The Milky Way, galaxies and cosmology, Computational science, Adult education, Vocational education research, Fluid and plasma physics
Publications
A near magnetic-to-kinetic energy equipartition flare from the relativistic jet in AO 0235 + 164 during 2013–2019
Whee Yeon Cheong, Sang Sung Lee, Sang Hyun Kim, Sincheol Kang, Jae Young Kim, Bindu Rani, Anthony C.S. Readhead, Sebastian Kiehlmann, Anne Lähteenmäki, Merja Tornikoski, Joni Tammi, Venkatessh Ramakrishnan, Iván Agudo, Antonio Fuentes, Efthalia Traianou, Juan Escudero, Clemens Thum, Ioannis Myserlis, Carolina Casadio, Mark Gurwell
2024
Monthly Notices of the Royal Astronomical Society
Time variability of the core-shift effect in the blazar 3C 454.3
Wara Chamani, Tuomas Savolainen, Eduardo Ros, Yuri Y. Kovalev, Kaj Wiik, Anne Lähteenmäki, Merja Tornikoski, Joni Tammi
2023
Astronomy and Astrophysics
Quasi-periodic behaviour in the radio and gamma-ray light curves of blazar PKS 1510-089
XP Li, Y Cai, HY Yang, A Lahteenmaki, M Tornikoski, J Tammi, S Suutarinen, Hai-Tao Yang, YH Luo, LS Wang
2023
Monthly Notices of the Royal Astronomical Society
Radio and γ-Ray Variability in Blazar S5 0716+714: A Year-like Quasi-periodic Oscillation in the Radio Light Curve
Xiao Pan Li, Hai Yan Yang, Yan Cai, Anne Lähteenmäki, Merja Tornikoski, Joni Tammi, Sofia Suutarinen, Hai Tao Yang, Yu Hui Luo, Li Sha Wang
2023
Astrophysical Journal
Multiwavelength Temporal Variability of the Blazar PKS 1510–089
Q. Yuan, Pankaj Kushwaha, Alok C. Gupta, Ashutosh Tripathi, Paul J. Wiita, M. Zhang, X. Liu, Anne Lähteenmäki, Merja Tornikoski, Joni Tammi, Venkatessh Ramakrishnan, L. Cui, X. Wang, M. F. Gu, Cosimo Bambi, A. E. Volvach
2023
Astrophysical Journal
Investigating the Blazar TXS 0506+056 through Sharp Multiwavelength Eyes during 2017-2019
V. A. Acciari, T. Aniello, S. Ansoldi, L. A. Antonelli, A. Arbet Engels, M. Artero, K. Asano, D. Baack, A. Babić, A. Baquero, U. Barres De Almeida, J. A. Barrio, I. Batković, J. Becerra González, W. Bednarek, E. Bernardini, M. Bernardos, A. Berti, J. Besenrieder, W. Bhattacharyya, C. Bigongiari, A. Biland, O. Blanch, H. Bökenkamp, G. Bonnoli, Å1/2 Bošnjak, G. Busetto, R. Carosi, G. Ceribella, M. Cerruti, Y. Chai, A. Chilingarian, S. Cikota, E. Colombo, J. L. Contreras, J. Cortina, S. Covino, G. D'Amico, V. D'Elia, P. Da Vela, F. Dazzi, A. De Angelis, B. De Lotto, A. Del Popolo, M. Delfino, V. Fallah Ramazani, T. Hovatta, A. Lähteenmäki, M. Tornikoski, J. Tammi
2022
The Astrophysical Journal
Multiwavelength study of the gravitationally lensed blazar QSO B0218+357 between 2016 and 2020
V. A. Acciari, S. Ansoldi, L. A. Antonelli, A. Arbet Engels, M. Artero, K. Asano, D. Baack, A. Babic, A. Baquero, U. Barres de Almeida, J. A. Barrio, J. Becerra Gonzalez, W. Bednarek, L. Bellizzi, E. Bernardini, M. Bernardos, A. Berti, J. Besenrieder, W. Bhattacharyya, C. Bigongiari, A. Biland, O. Blanch, G. Bonnoli, Z. Bosnjak, G. Busetto, R. Carosi, G. Ceribella, M. Cerruti, Y. Chai, A. Chilingarian, S. Cikota, S. M. Colak, E. Colombo, J. L. Contreras, J. Cortina, S. Covino, G. D'Amico, V. D'Elia, P. Da Vela, F. Dazzi, A. De Angelis, B. De Lotto, M. Delfino, J. Delgado, C. Delgado Mendez, D. Depaoli, F. Di Pierro, L. Di Venere, E. Do Souto Espineira, D. Dominis Prester, A. Donini, D. Dorner, M. Doro, D. Elsaesser, V. Fallah Ramazani, A. Fattorini, G. Ferrara, M. Fonseca, L. Font, C. Fruck, S. Fukami, R. J. Garcia Lopez, M. Garczarczyk, S. Gasparyan, M. Gaug, N. Giglietto, F. Giordano, P. Gliwny, N. Godinovic, J. G. Green, D. Green, D. Hadasch, A. Hahn, L. Heckmann, J. Herrera, J. Hoang, D. Hrupec, M. Hutten, T. Inada, S. Inoue, K. Ishio, Y. Iwamura, I. Jimenez, J. Jormanainen, L. Jouvin, Y. Kajiwara, M. Karjalainen, D. Kerszberg, Y. Kobayashi, H. Kubo, J. Kushida, A. Lamastra, D. Lelas, F. Leone, E. Lindfors, S. Lombardi, F. Longo, R. Lopez-Coto, M. Lopez-Moya, A. Lopez-Oramas, S. Loporchio, B. Machado de Oliveira Fraga, C. Maggio, P. Majumdar, M. Makariev, M. Mallamaci, G. Maneva, M. Manganaro, K. Mannheim, L. Maraschi, M. Mariotti, M. Martinez, D. Mazin, S. Menchiari, S. Mender, S. Micanovic, D. Miceli, T. Miener, M. Minev, J. M. Miranda, R. Mirzoyan, E. Molina, A. Moralejo, D. Morcuende, Diana Moreno, E. Moretti, V. Neustroev, C. Nigro, K. Nilsson, K. Nishijima, K. Noda, S. Nozaki, Y. Ohtani, T. Oka, J. Otero-Santos, S. Paiano, M. Palatiello, D. Paneque, R. Paoletti, J. M. Paredes, L. Pavletic, P. Penil, C. Perennes, M. Persic, P. G. Prada Moroni, E. Prandini, C. Priyadarshi, Ivica Puljak, W. Rhode, M. Ribo, J. Rico, C. Righi, A. Rugliancich, L. Saha, N. Sahakyan, T. Saito, S. Sakurai, K. Satalecka, F. G. Saturni, B. Schleicher, K. Schmidt, T. Schweizer, J. Sitarek, D. Sobczynska, A. Spolon, A. Stamerra, D. Strom, M. Strzys, Y. Suda, T. Suric, M. Takahashi, F. Tavecchio, P. Temnikov, T. Terzic, M. Teshima, L. Tosti, S. Truzzi, A. Tutone, S. Ubach, J. van Scherpenberg, G. Vanzo, M. Vazquez Acosta, S. Ventura, V. Verguilov, C. F. Vigorito, V. Vitale, I. Vovk, M. Will, C. Wunderlich, D. Zaric, F. de Palma, F. D'Ammando, A. Barnacka, D. K. Sahu, M. Hodges, T. Hovatta, S. Kiehlmann, W. Max-Moerbeck, A. C. S. Readhead, R. Reeves, T. J. Pearson, A. Lahteenmaki, M. Tornikoski, J. Tammi, S. Suutarinen, K. Hada, K. Niinuma
2022
Monthly Notices of the Royal Astronomical Society
Multiwavelength Variability Power Spectrum Analysis of the Blazars 3C 279 and PKS 1510-089 on Multiple Timescales
Arti Goyal, Marian Soida, Łukasz Stawarz, Paul J. Wiita, Kari Nilsson, Svetlana Jorstad, Alan P. Marscher, Margo F. Aller, Hugh D. Aller, Anne Lähteenmäki, Talvikki Hovatta, Staszek Zoła, Krzysztof Nalewajko, Merja Tornikoski, Joni Tammi, Mark Hodges, Sebastian Kiehlmann, Anthony C.S. Readhead, Walter Max-Moerbeck, Elina Lindfors, Vandad Fallah Ramazani, D. E. Reichart, D. B. Caton, Janeth Valverde, Deirdre Horan, Roopesh Ojha, Pfesesani Van Zyl
2022
The Astrophysical Journal
Calibration of CALLISTO data
Juha Kallunki, Christian Monstein, Petri Kirves, Joni Tammi, Ari Mujunen
2022
Magnetic field strengths of the synchrotron self-absorption region in the jet of CTA 102 during radio flares
Sang-Hyun Kim, Sang-Sung Lee, Jee Won Lee, Jeffrey A. Hodgson, Sincheol Kang, Juan-Carlos Algaba, Jae-Young Kim, Mark Hodges, Ivan Agudo, Antonio Fuentes, Juan Escudero, Ioannis Myserlis, Efthalia Traianou, Anne Lahteenmaki, Merja Tornikoski, Joni Tammi, Venkatessh Ramakrishnan, Emilia Jarvela
2022
Monthly Notices of the Royal Astronomical Society